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ide: add hwif->chipset fixup to ide_device_add()
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / ide / ide-probe.c
CommitLineData
1da177e4
LT		 1/*
2 * linux/drivers/ide/ide-probe.c Version 1.11 Mar 05, 2003
3 *
4 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
5 */
6
7/*
8 * Mostly written by Mark Lord <mlord@pobox.com>
9 * and Gadi Oxman <gadio@netvision.net.il>
10 * and Andre Hedrick <andre@linux-ide.org>
11 *
12 * See linux/MAINTAINERS for address of current maintainer.
13 *
14 * This is the IDE probe module, as evolved from hd.c and ide.c.
15 *
bbe4d6d8
BZ		 16 * -- increase WAIT_PIDENTIFY to avoid CD-ROM locking at boot
17 * by Andrea Arcangeli
1da177e4
LT		 18 */
19
1da177e4
LT		 20#include <linux/module.h>
21#include <linux/types.h>
22#include <linux/string.h>
23#include <linux/kernel.h>
24#include <linux/timer.h>
25#include <linux/mm.h>
26#include <linux/interrupt.h>
27#include <linux/major.h>
28#include <linux/errno.h>
29#include <linux/genhd.h>
30#include <linux/slab.h>
31#include <linux/delay.h>
32#include <linux/ide.h>
33#include <linux/spinlock.h>
34#include <linux/kmod.h>
35#include <linux/pci.h>
dc81785d 36#include <linux/scatterlist.h>
1da177e4
LT		 37
38#include <asm/byteorder.h>
39#include <asm/irq.h>
40#include <asm/uaccess.h>
41#include <asm/io.h>
42
43/**
44 * generic_id - add a generic drive id
45 * @drive: drive to make an ID block for
46 *
47 * Add a fake id field to the drive we are passed. This allows
48 * use to skip a ton of NULL checks (which people always miss)
49 * and make drive properties unconditional outside of this file
50 */
51
52static void generic_id(ide_drive_t *drive)
53{
54 drive->id->cyls = drive->cyl;
55 drive->id->heads = drive->head;
56 drive->id->sectors = drive->sect;
57 drive->id->cur_cyls = drive->cyl;
58 drive->id->cur_heads = drive->head;
59 drive->id->cur_sectors = drive->sect;
60}
61
62static void ide_disk_init_chs(ide_drive_t *drive)
63{
64 struct hd_driveid *id = drive->id;
65
66 /* Extract geometry if we did not already have one for the drive */
67 if (!drive->cyl || !drive->head || !drive->sect) {
68 drive->cyl = drive->bios_cyl = id->cyls;
69 drive->head = drive->bios_head = id->heads;
70 drive->sect = drive->bios_sect = id->sectors;
71 }
72
73 /* Handle logical geometry translation by the drive */
74 if ((id->field_valid & 1) && id->cur_cyls &&
75 id->cur_heads && (id->cur_heads <= 16) && id->cur_sectors) {
76 drive->cyl = id->cur_cyls;
77 drive->head = id->cur_heads;
78 drive->sect = id->cur_sectors;
79 }
80
81 /* Use physical geometry if what we have still makes no sense */
82 if (drive->head > 16 && id->heads && id->heads <= 16) {
83 drive->cyl = id->cyls;
84 drive->head = id->heads;
85 drive->sect = id->sectors;
86 }
87}
88
89static void ide_disk_init_mult_count(ide_drive_t *drive)
90{
91 struct hd_driveid *id = drive->id;
92
93 drive->mult_count = 0;
94 if (id->max_multsect) {
95#ifdef CONFIG_IDEDISK_MULTI_MODE
96 id->multsect = ((id->max_multsect/2) > 1) ? id->max_multsect : 0;
97 id->multsect_valid = id->multsect ? 1 : 0;
4ee06b7e 98 drive->mult_req = id->multsect_valid ? id->max_multsect : 0;
1da177e4
LT		 99 drive->special.b.set_multmode = drive->mult_req ? 1 : 0;
100#else /* original, pre IDE-NFG, per request of AC */
4ee06b7e 101 drive->mult_req = 0;
1da177e4
LT		 102 if (drive->mult_req > id->max_multsect)
103 drive->mult_req = id->max_multsect;
104 if (drive->mult_req || ((id->multsect_valid & 1) && id->multsect))
105 drive->special.b.set_multmode = 1;
106#endif
107 }
108}
109
1da177e4
LT		 110/**
111 * do_identify - identify a drive
112 * @drive: drive to identify
113 * @cmd: command used
114 *
115 * Called when we have issued a drive identify command to
116 * read and parse the results. This function is run with
117 * interrupts disabled.
118 */
119
120static inline void do_identify (ide_drive_t *drive, u8 cmd)
121{
122 ide_hwif_t *hwif = HWIF(drive);
123 int bswap = 1;
124 struct hd_driveid *id;
125
126 id = drive->id;
127 /* read 512 bytes of id info */
128 hwif->ata_input_data(drive, id, SECTOR_WORDS);
129
130 drive->id_read = 1;
131 local_irq_enable();
132 ide_fix_driveid(id);
133
e71bc140 134#if defined (CONFIG_SCSI_EATA_PIO) || defined (CONFIG_SCSI_EATA)
1da177e4
LT		 135 /*
136 * EATA SCSI controllers do a hardware ATA emulation:
137 * Ignore them if there is a driver for them available.
138 */
139 if ((id->model[0] == 'P' && id->model[1] == 'M') ||
140 (id->model[0] == 'S' && id->model[1] == 'K')) {
141 printk("%s: EATA SCSI HBA %.10s\n", drive->name, id->model);
142 goto err_misc;
143 }
e71bc140 144#endif /* CONFIG_SCSI_EATA || CONFIG_SCSI_EATA_PIO */
1da177e4
LT		 145
146 /*
147 * WIN_IDENTIFY returns little-endian info,
148 * WIN_PIDENTIFY *usually* returns little-endian info.
149 */
150 if (cmd == WIN_PIDENTIFY) {
151 if ((id->model[0] == 'N' && id->model[1] == 'E') /* NEC */
152 || (id->model[0] == 'F' && id->model[1] == 'X') /* Mitsumi */
153 || (id->model[0] == 'P' && id->model[1] == 'i'))/* Pioneer */
154 /* Vertos drives may still be weird */
155 bswap ^= 1;
156 }
157 ide_fixstring(id->model, sizeof(id->model), bswap);
158 ide_fixstring(id->fw_rev, sizeof(id->fw_rev), bswap);
159 ide_fixstring(id->serial_no, sizeof(id->serial_no), bswap);
160
699b052a
TH		 161 /* we depend on this a lot! */
162 id->model[sizeof(id->model)-1] = '\0';
163
1da177e4
LT		 164 if (strstr(id->model, "E X A B Y T E N E S T"))
165 goto err_misc;
166
1da177e4
LT		 167 printk("%s: %s, ", drive->name, id->model);
168 drive->present = 1;
169 drive->dead = 0;
170
171 /*
172 * Check for an ATAPI device
173 */
174 if (cmd == WIN_PIDENTIFY) {
175 u8 type = (id->config >> 8) & 0x1f;
176 printk("ATAPI ");
177 switch (type) {
178 case ide_floppy:
179 if (!strstr(id->model, "CD-ROM")) {
180 if (!strstr(id->model, "oppy") &&
181 !strstr(id->model, "poyp") &&
182 !strstr(id->model, "ZIP"))
183 printk("cdrom or floppy?, assuming ");
184 if (drive->media != ide_cdrom) {
185 printk ("FLOPPY");
186 drive->removable = 1;
187 break;
188 }
189 }
190 /* Early cdrom models used zero */
191 type = ide_cdrom;
192 case ide_cdrom:
193 drive->removable = 1;
194#ifdef CONFIG_PPC
195 /* kludge for Apple PowerBook internal zip */
196 if (!strstr(id->model, "CD-ROM") &&
197 strstr(id->model, "ZIP")) {
198 printk ("FLOPPY");
199 type = ide_floppy;
200 break;
201 }
202#endif
203 printk ("CD/DVD-ROM");
204 break;
205 case ide_tape:
206 printk ("TAPE");
207 break;
208 case ide_optical:
209 printk ("OPTICAL");
210 drive->removable = 1;
211 break;
212 default:
213 printk("UNKNOWN (type %d)", type);
214 break;
215 }
216 printk (" drive\n");
217 drive->media = type;
218 /* an ATAPI device ignores DRDY */
219 drive->ready_stat = 0;
220 return;
221 }
222
223 /*
224 * Not an ATAPI device: looks like a "regular" hard disk
225 */
98109337
RP		 226
227 /*
228 * 0x848a = CompactFlash device
229 * These are *not* removable in Linux definition of the term
230 */
231
232 if ((id->config != 0x848a) && (id->config & (1<<7)))
1da177e4
LT		 233 drive->removable = 1;
234
1da177e4 235 drive->media = ide_disk;
98109337 236 printk("%s DISK drive\n", (id->config == 0x848a) ? "CFA" : "ATA" );
cd3dbc99 237
1da177e4
LT		 238 return;
239
240err_misc:
241 kfree(id);
242 drive->present = 0;
243 return;
244}
245
246/**
247 * actual_try_to_identify - send ata/atapi identify
248 * @drive: drive to identify
249 * @cmd: command to use
250 *
251 * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive
252 * and waits for a response. It also monitors irqs while this is
253 * happening, in hope of automatically determining which one is
254 * being used by the interface.
255 *
256 * Returns: 0 device was identified
257 * 1 device timed-out (no response to identify request)
258 * 2 device aborted the command (refused to identify itself)
259 */
260
261static int actual_try_to_identify (ide_drive_t *drive, u8 cmd)
262{
263 ide_hwif_t *hwif = HWIF(drive);
264 int rc;
265 unsigned long hd_status;
266 unsigned long timeout;
267 u8 s = 0, a = 0;
268
269 /* take a deep breath */
270 msleep(50);
271
272 if (IDE_CONTROL_REG) {
273 a = hwif->INB(IDE_ALTSTATUS_REG);
274 s = hwif->INB(IDE_STATUS_REG);
275 if ((a ^ s) & ~INDEX_STAT) {
276 printk(KERN_INFO "%s: probing with STATUS(0x%02x) instead of "
277 "ALTSTATUS(0x%02x)\n", drive->name, s, a);
278 /* ancient Seagate drives, broken interfaces */
279 hd_status = IDE_STATUS_REG;
280 } else {
281 /* use non-intrusive polling */
282 hd_status = IDE_ALTSTATUS_REG;
283 }
284 } else
285 hd_status = IDE_STATUS_REG;
286
287 /* set features register for atapi
288 * identify command to be sure of reply
289 */
290 if ((cmd == WIN_PIDENTIFY))
291 /* disable dma & overlap */
292 hwif->OUTB(0, IDE_FEATURE_REG);
293
294 /* ask drive for ID */
295 hwif->OUTB(cmd, IDE_COMMAND_REG);
296
297 timeout = ((cmd == WIN_IDENTIFY) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2;
298 timeout += jiffies;
299 do {
300 if (time_after(jiffies, timeout)) {
301 /* drive timed-out */
302 return 1;
303 }
304 /* give drive a breather */
305 msleep(50);
306 } while ((hwif->INB(hd_status)) & BUSY_STAT);
307
308 /* wait for IRQ and DRQ_STAT */
309 msleep(50);
310 if (OK_STAT((hwif->INB(IDE_STATUS_REG)), DRQ_STAT, BAD_R_STAT)) {
311 unsigned long flags;
312
313 /* local CPU only; some systems need this */
314 local_irq_save(flags);
315 /* drive returned ID */
316 do_identify(drive, cmd);
317 /* drive responded with ID */
318 rc = 0;
319 /* clear drive IRQ */
320 (void) hwif->INB(IDE_STATUS_REG);
321 local_irq_restore(flags);
322 } else {
323 /* drive refused ID */
324 rc = 2;
325 }
326 return rc;
327}
328
329/**
330 * try_to_identify - try to identify a drive
331 * @drive: drive to probe
332 * @cmd: command to use
333 *
334 * Issue the identify command and then do IRQ probing to
335 * complete the identification when needed by finding the
336 * IRQ the drive is attached to
337 */
338
339static int try_to_identify (ide_drive_t *drive, u8 cmd)
340{
341 ide_hwif_t *hwif = HWIF(drive);
342 int retval;
343 int autoprobe = 0;
344 unsigned long cookie = 0;
345
346 /*
347 * Disable device irq unless we need to
348 * probe for it. Otherwise we'll get spurious
349 * interrupts during the identify-phase that
350 * the irq handler isn't expecting.
351 */
352 if (IDE_CONTROL_REG) {
353 u8 ctl = drive->ctl | 2;
354 if (!hwif->irq) {
355 autoprobe = 1;
356 cookie = probe_irq_on();
357 /* enable device irq */
358 ctl &= ~2;
359 }
360 hwif->OUTB(ctl, IDE_CONTROL_REG);
361 }
362
363 retval = actual_try_to_identify(drive, cmd);
364
365 if (autoprobe) {
366 int irq;
367 /* mask device irq */
368 hwif->OUTB(drive->ctl|2, IDE_CONTROL_REG);
369 /* clear drive IRQ */
370 (void) hwif->INB(IDE_STATUS_REG);
371 udelay(5);
372 irq = probe_irq_off(cookie);
373 if (!hwif->irq) {
374 if (irq > 0) {
375 hwif->irq = irq;
376 } else {
377 /* Mmmm.. multiple IRQs..
378 * don't know which was ours
379 */
380 printk("%s: IRQ probe failed (0x%lx)\n",
381 drive->name, cookie);
382 }
383 }
384 }
385 return retval;
386}
387
388
389/**
390 * do_probe - probe an IDE device
391 * @drive: drive to probe
392 * @cmd: command to use
393 *
394 * do_probe() has the difficult job of finding a drive if it exists,
395 * without getting hung up if it doesn't exist, without trampling on
396 * ethernet cards, and without leaving any IRQs dangling to haunt us later.
397 *
398 * If a drive is "known" to exist (from CMOS or kernel parameters),
399 * but does not respond right away, the probe will "hang in there"
400 * for the maximum wait time (about 30 seconds), otherwise it will
401 * exit much more quickly.
402 *
403 * Returns: 0 device was identified
404 * 1 device timed-out (no response to identify request)
405 * 2 device aborted the command (refused to identify itself)
406 * 3 bad status from device (possible for ATAPI drives)
407 * 4 probe was not attempted because failure was obvious
408 */
409
410static int do_probe (ide_drive_t *drive, u8 cmd)
411{
412 int rc;
413 ide_hwif_t *hwif = HWIF(drive);
414
415 if (drive->present) {
416 /* avoid waiting for inappropriate probes */
417 if ((drive->media != ide_disk) && (cmd == WIN_IDENTIFY))
418 return 4;
419 }
420#ifdef DEBUG
421 printk("probing for %s: present=%d, media=%d, probetype=%s\n",
422 drive->name, drive->present, drive->media,
423 (cmd == WIN_IDENTIFY) ? "ATA" : "ATAPI");
424#endif
425
426 /* needed for some systems
427 * (e.g. crw9624 as drive0 with disk as slave)
428 */
429 msleep(50);
430 SELECT_DRIVE(drive);
431 msleep(50);
432 if (hwif->INB(IDE_SELECT_REG) != drive->select.all && !drive->present) {
433 if (drive->select.b.unit != 0) {
434 /* exit with drive0 selected */
435 SELECT_DRIVE(&hwif->drives[0]);
436 /* allow BUSY_STAT to assert & clear */
437 msleep(50);
438 }
439 /* no i/f present: mmm.. this should be a 4 -ml */
440 return 3;
441 }
442
443 if (OK_STAT((hwif->INB(IDE_STATUS_REG)), READY_STAT, BUSY_STAT) ||
444 drive->present || cmd == WIN_PIDENTIFY) {
445 /* send cmd and wait */
446 if ((rc = try_to_identify(drive, cmd))) {
447 /* failed: try again */
448 rc = try_to_identify(drive,cmd);
449 }
450 if (hwif->INB(IDE_STATUS_REG) == (BUSY_STAT|READY_STAT))
451 return 4;
452
453 if ((rc == 1 && cmd == WIN_PIDENTIFY) &&
454 ((drive->autotune == IDE_TUNE_DEFAULT) ||
455 (drive->autotune == IDE_TUNE_AUTO))) {
456 unsigned long timeout;
457 printk("%s: no response (status = 0x%02x), "
458 "resetting drive\n", drive->name,
459 hwif->INB(IDE_STATUS_REG));
460 msleep(50);
461 hwif->OUTB(drive->select.all, IDE_SELECT_REG);
462 msleep(50);
463 hwif->OUTB(WIN_SRST, IDE_COMMAND_REG);
464 timeout = jiffies;
465 while (((hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) &&
466 time_before(jiffies, timeout + WAIT_WORSTCASE))
467 msleep(50);
468 rc = try_to_identify(drive, cmd);
469 }
470 if (rc == 1)
471 printk("%s: no response (status = 0x%02x)\n",
472 drive->name, hwif->INB(IDE_STATUS_REG));
473 /* ensure drive irq is clear */
474 (void) hwif->INB(IDE_STATUS_REG);
475 } else {
476 /* not present or maybe ATAPI */
477 rc = 3;
478 }
479 if (drive->select.b.unit != 0) {
480 /* exit with drive0 selected */
481 SELECT_DRIVE(&hwif->drives[0]);
482 msleep(50);
483 /* ensure drive irq is clear */
484 (void) hwif->INB(IDE_STATUS_REG);
485 }
486 return rc;
487}
488
489/*
490 *
491 */
492static void enable_nest (ide_drive_t *drive)
493{
494 ide_hwif_t *hwif = HWIF(drive);
495 unsigned long timeout;
496
497 printk("%s: enabling %s -- ", hwif->name, drive->id->model);
498 SELECT_DRIVE(drive);
499 msleep(50);
500 hwif->OUTB(EXABYTE_ENABLE_NEST, IDE_COMMAND_REG);
501 timeout = jiffies + WAIT_WORSTCASE;
502 do {
503 if (time_after(jiffies, timeout)) {
504 printk("failed (timeout)\n");
505 return;
506 }
507 msleep(50);
508 } while ((hwif->INB(IDE_STATUS_REG)) & BUSY_STAT);
509
510 msleep(50);
511
512 if (!OK_STAT((hwif->INB(IDE_STATUS_REG)), 0, BAD_STAT)) {
513 printk("failed (status = 0x%02x)\n", hwif->INB(IDE_STATUS_REG));
514 } else {
515 printk("success\n");
516 }
517
518 /* if !(success||timed-out) */
519 if (do_probe(drive, WIN_IDENTIFY) >= 2) {
520 /* look for ATAPI device */
521 (void) do_probe(drive, WIN_PIDENTIFY);
522 }
523}
524
525/**
526 * probe_for_drives - upper level drive probe
527 * @drive: drive to probe for
528 *
529 * probe_for_drive() tests for existence of a given drive using do_probe()
530 * and presents things to the user as needed.
531 *
532 * Returns: 0 no device was found
533 * 1 device was found (note: drive->present might
534 * still be 0)
535 */
536
537static inline u8 probe_for_drive (ide_drive_t *drive)
538{
539 /*
540 * In order to keep things simple we have an id
541 * block for all drives at all times. If the device
542 * is pre ATA or refuses ATA/ATAPI identify we
543 * will add faked data to this.
544 *
545 * Also note that 0 everywhere means "can't do X"
546 */
547
f5e3c2fa 548 drive->id = kzalloc(SECTOR_WORDS *4, GFP_KERNEL);
1da177e4
LT		 549 drive->id_read = 0;
550 if(drive->id == NULL)
551 {
552 printk(KERN_ERR "ide: out of memory for id data.\n");
553 return 0;
554 }
1da177e4
LT		 555 strcpy(drive->id->model, "UNKNOWN");
556
557 /* skip probing? */
558 if (!drive->noprobe)
559 {
560 /* if !(success||timed-out) */
561 if (do_probe(drive, WIN_IDENTIFY) >= 2) {
562 /* look for ATAPI device */
563 (void) do_probe(drive, WIN_PIDENTIFY);
564 }
1da177e4
LT		 565 if (!drive->present)
566 /* drive not found */
567 return 0;
78595575
AC		 568 if (strstr(drive->id->model, "E X A B Y T E N E S T"))
569 enable_nest(drive);
1da177e4
LT		 570
571 /* identification failed? */
572 if (!drive->id_read) {
573 if (drive->media == ide_disk) {
574 printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n",
575 drive->name, drive->cyl,
576 drive->head, drive->sect);
577 } else if (drive->media == ide_cdrom) {
578 printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name);
579 } else {
580 /* nuke it */
581 printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name);
582 drive->present = 0;
583 }
584 }
585 /* drive was found */
586 }
587 if(!drive->present)
588 return 0;
589 /* The drive wasn't being helpful. Add generic info only */
590 if (drive->id_read == 0) {
591 generic_id(drive);
592 return 1;
593 }
594
595 if (drive->media == ide_disk) {
596 ide_disk_init_chs(drive);
597 ide_disk_init_mult_count(drive);
598 }
599
600 return drive->present;
601}
602
603static void hwif_release_dev (struct device *dev)
604{
605 ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev);
606
f36d4024 607 complete(&hwif->gendev_rel_comp);
1da177e4
LT		 608}
609
610static void hwif_register (ide_hwif_t *hwif)
611{
349ae23f
RD		 612 int ret;
613
1da177e4
LT		 614 /* register with global device tree */
615 strlcpy(hwif->gendev.bus_id,hwif->name,BUS_ID_SIZE);
616 hwif->gendev.driver_data = hwif;
617 if (hwif->gendev.parent == NULL) {
618 if (hwif->pci_dev)
619 hwif->gendev.parent = &hwif->pci_dev->dev;
620 else
621 /* Would like to do = &device_legacy */
622 hwif->gendev.parent = NULL;
623 }
624 hwif->gendev.release = hwif_release_dev;
349ae23f
RD		 625 ret = device_register(&hwif->gendev);
626 if (ret < 0)
627 printk(KERN_WARNING "IDE: %s: device_register error: %d\n",
628 __FUNCTION__, ret);
1da177e4
LT		 629}
630
631static int wait_hwif_ready(ide_hwif_t *hwif)
632{
8266105b 633 int unit, rc;
1da177e4
LT		 634
635 printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name);
636
637 /* Let HW settle down a bit from whatever init state we
638 * come from */
639 mdelay(2);
640
641 /* Wait for BSY bit to go away, spec timeout is 30 seconds,
642 * I know of at least one disk who takes 31 seconds, I use 35
643 * here to be safe
644 */
645 rc = ide_wait_not_busy(hwif, 35000);
646 if (rc)
647 return rc;
648
649 /* Now make sure both master & slave are ready */
8266105b
JS		 650 for (unit = 0; unit < MAX_DRIVES; unit++) {
651 ide_drive_t *drive = &hwif->drives[unit];
652
653 /* Ignore disks that we will not probe for later. */
654 if (!drive->noprobe || drive->present) {
655 SELECT_DRIVE(drive);
ad0e74d3
BZ		 656 if (IDE_CONTROL_REG)
657 hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
8266105b
JS		 658 mdelay(2);
659 rc = ide_wait_not_busy(hwif, 35000);
660 if (rc)
661 goto out;
662 } else
663 printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n",
664 drive->name);
665 }
666out:
1da177e4 667 /* Exit function with master reselected (let's be sane) */
8266105b
JS		 668 if (unit)
669 SELECT_DRIVE(&hwif->drives[0]);
670
1da177e4
LT		 671 return rc;
672}
673
674/**
675 * ide_undecoded_slave - look for bad CF adapters
f01393e4 676 * @drive1: drive
1da177e4
LT		 677 *
678 * Analyse the drives on the interface and attempt to decide if we
679 * have the same drive viewed twice. This occurs with crap CF adapters
680 * and PCMCIA sometimes.
681 */
682
f01393e4 683void ide_undecoded_slave(ide_drive_t *drive1)
1da177e4 684{
f01393e4 685 ide_drive_t *drive0 = &drive1->hwif->drives[0];
1da177e4 686
f01393e4 687 if ((drive1->dn & 1) == 0 || drive0->present == 0)
1da177e4
LT		 688 return;
689
690 /* If the models don't match they are not the same product */
691 if (strcmp(drive0->id->model, drive1->id->model))
692 return;
693
694 /* Serial numbers do not match */
695 if (strncmp(drive0->id->serial_no, drive1->id->serial_no, 20))
696 return;
697
698 /* No serial number, thankfully very rare for CF */
699 if (drive0->id->serial_no[0] == 0)
700 return;
701
702 /* Appears to be an IDE flash adapter with decode bugs */
703 printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n");
704
705 drive1->present = 0;
706}
707
708EXPORT_SYMBOL_GPL(ide_undecoded_slave);
709
710/*
711 * This routine only knows how to look for drive units 0 and 1
712 * on an interface, so any setting of MAX_DRIVES > 2 won't work here.
713 */
fd9bb539 714static void probe_hwif(ide_hwif_t *hwif)
1da177e4 715{
1da177e4
LT		 716 unsigned long flags;
717 unsigned int irqd;
b140b99c 718 int unit;
1da177e4
LT		 719
720 if (hwif->noprobe)
721 return;
722
723 if ((hwif->chipset != ide_4drives || !hwif->mate || !hwif->mate->present) &&
724 (ide_hwif_request_regions(hwif))) {
725 u16 msgout = 0;
726 for (unit = 0; unit < MAX_DRIVES; ++unit) {
727 ide_drive_t *drive = &hwif->drives[unit];
728 if (drive->present) {
729 drive->present = 0;
730 printk(KERN_ERR "%s: ERROR, PORTS ALREADY IN USE\n",
731 drive->name);
732 msgout = 1;
733 }
734 }
735 if (!msgout)
736 printk(KERN_ERR "%s: ports already in use, skipping probe\n",
737 hwif->name);
738 return;
739 }
740
741 /*
742 * We must always disable IRQ, as probe_for_drive will assert IRQ, but
743 * we'll install our IRQ driver much later...
744 */
745 irqd = hwif->irq;
746 if (irqd)
747 disable_irq(hwif->irq);
748
749 local_irq_set(flags);
750
751 /* This is needed on some PPCs and a bunch of BIOS-less embedded
752 * platforms. Typical cases are:
753 *
754 * - The firmware hard reset the disk before booting the kernel,
755 * the drive is still doing it's poweron-reset sequence, that
756 * can take up to 30 seconds
757 * - The firmware does nothing (or no firmware), the device is
758 * still in POST state (same as above actually).
759 * - Some CD/DVD/Writer combo drives tend to drive the bus during
760 * their reset sequence even when they are non-selected slave
761 * devices, thus preventing discovery of the main HD
762 *
763 * Doing this wait-for-busy should not harm any existing configuration
764 * (at least things won't be worse than what current code does, that
765 * is blindly go & talk to the drive) and fix some issues like the
766 * above.
767 *
768 * BenH.
769 */
770 if (wait_hwif_ready(hwif) == -EBUSY)
771 printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name);
772
773 /*
b140b99c 774 * Need to probe slave device first to make it release PDIAG-.
1da177e4 775 */
b140b99c 776 for (unit = MAX_DRIVES - 1; unit >= 0; unit--) {
1da177e4
LT		 777 ide_drive_t *drive = &hwif->drives[unit];
778 drive->dn = (hwif->channel ? 2 : 0) + unit;
779 (void) probe_for_drive(drive);
780 if (drive->present && !hwif->present) {
781 hwif->present = 1;
782 if (hwif->chipset != ide_4drives ||
783 !hwif->mate ||
784 !hwif->mate->present) {
785 hwif_register(hwif);
786 }
787 }
788 }
789 if (hwif->io_ports[IDE_CONTROL_OFFSET] && hwif->reset) {
790 unsigned long timeout = jiffies + WAIT_WORSTCASE;
791 u8 stat;
792
793 printk(KERN_WARNING "%s: reset\n", hwif->name);
794 hwif->OUTB(12, hwif->io_ports[IDE_CONTROL_OFFSET]);
795 udelay(10);
796 hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]);
797 do {
798 msleep(50);
799 stat = hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]);
800 } while ((stat & BUSY_STAT) && time_after(timeout, jiffies));
801
802 }
803 local_irq_restore(flags);
804 /*
805 * Use cached IRQ number. It might be (and is...) changed by probe
806 * code above
807 */
808 if (irqd)
809 enable_irq(irqd);
810
811 if (!hwif->present) {
812 ide_hwif_release_regions(hwif);
813 return;
814 }
815
f01393e4
BZ		 816 for (unit = 0; unit < MAX_DRIVES; unit++) {
817 ide_drive_t *drive = &hwif->drives[unit];
818
819 if (drive->present && hwif->quirkproc)
820 hwif->quirkproc(drive);
821 }
0380dad4 822
1da177e4
LT		 823 for (unit = 0; unit < MAX_DRIVES; ++unit) {
824 ide_drive_t *drive = &hwif->drives[unit];
825
826 if (drive->present) {
26bcb879
BZ		 827 if (drive->autotune == IDE_TUNE_AUTO)
828 ide_set_max_pio(drive);
1da177e4
LT		 829
830 if (drive->autotune != IDE_TUNE_DEFAULT &&
831 drive->autotune != IDE_TUNE_AUTO)
832 continue;
833
834 drive->nice1 = 1;
835
15ce926a 836 if (hwif->dma_host_set)
8c0697cc 837 ide_set_dma(drive);
1da177e4
LT		 838 }
839 }
208a08f7
KG		 840
841 for (unit = 0; unit < MAX_DRIVES; ++unit) {
842 ide_drive_t *drive = &hwif->drives[unit];
843
844 if (hwif->no_io_32bit)
845 drive->no_io_32bit = 1;
846 else
847 drive->no_io_32bit = drive->id->dword_io ? 1 : 0;
848 }
1da177e4
LT		 849}
850
1da177e4
LT		 851#if MAX_HWIFS > 1
852/*
853 * save_match() is used to simplify logic in init_irq() below.
854 *
855 * A loophole here is that we may not know about a particular
856 * hwif's irq until after that hwif is actually probed/initialized..
857 * This could be a problem for the case where an hwif is on a
858 * dual interface that requires serialization (eg. cmd640) and another
859 * hwif using one of the same irqs is initialized beforehand.
860 *
861 * This routine detects and reports such situations, but does not fix them.
862 */
863static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match)
864{
865 ide_hwif_t *m = *match;
866
867 if (m && m->hwgroup && m->hwgroup != new->hwgroup) {
868 if (!new->hwgroup)
869 return;
870 printk("%s: potential irq problem with %s and %s\n",
871 hwif->name, new->name, m->name);
872 }
873 if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */
874 *match = new;
875}
876#endif /* MAX_HWIFS > 1 */
877
878/*
879 * init request queue
880 */
881static int ide_init_queue(ide_drive_t *drive)
882{
165125e1 883 struct request_queue *q;
1da177e4
LT		 884 ide_hwif_t *hwif = HWIF(drive);
885 int max_sectors = 256;
886 int max_sg_entries = PRD_ENTRIES;
887
888 /*
889 * Our default set up assumes the normal IDE case,
890 * that is 64K segmenting, standard PRD setup
891 * and LBA28. Some drivers then impose their own
892 * limits and LBA48 we could raise it but as yet
893 * do not.
894 */
1946089a 895
556e58fe 896 q = blk_init_queue_node(do_ide_request, &ide_lock, hwif_to_node(hwif));
1da177e4
LT		 897 if (!q)
898 return 1;
899
900 q->queuedata = drive;
901 blk_queue_segment_boundary(q, 0xffff);
902
903 if (!hwif->rqsize) {
238e4f14
BZ		 904 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
905 (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA))
1da177e4
LT		 906 hwif->rqsize = 256;
907 else
908 hwif->rqsize = 65536;
909 }
910 if (hwif->rqsize < max_sectors)
911 max_sectors = hwif->rqsize;
912 blk_queue_max_sectors(q, max_sectors);
913
914#ifdef CONFIG_PCI
915 /* When we have an IOMMU, we may have a problem where pci_map_sg()
916 * creates segments that don't completely match our boundary
917 * requirements and thus need to be broken up again. Because it
918 * doesn't align properly either, we may actually have to break up
919 * to more segments than what was we got in the first place, a max
920 * worst case is twice as many.
921 * This will be fixed once we teach pci_map_sg() about our boundary
922 * requirements, hopefully soon. *FIXME*
923 */
924 if (!PCI_DMA_BUS_IS_PHYS)
925 max_sg_entries >>= 1;
926#endif /* CONFIG_PCI */
927
928 blk_queue_max_hw_segments(q, max_sg_entries);
929 blk_queue_max_phys_segments(q, max_sg_entries);
930
931 /* assign drive queue */
932 drive->queue = q;
933
934 /* needs drive->queue to be set */
935 ide_toggle_bounce(drive, 1);
936
1da177e4
LT		 937 return 0;
938}
939
940/*
941 * This routine sets up the irq for an ide interface, and creates a new
942 * hwgroup for the irq/hwif if none was previously assigned.
943 *
944 * Much of the code is for correctly detecting/handling irq sharing
945 * and irq serialization situations. This is somewhat complex because
946 * it handles static as well as dynamic (PCMCIA) IDE interfaces.
1da177e4
LT		 947 */
948static int init_irq (ide_hwif_t *hwif)
949{
950 unsigned int index;
951 ide_hwgroup_t *hwgroup;
952 ide_hwif_t *match = NULL;
953
954
955 BUG_ON(in_interrupt());
956 BUG_ON(irqs_disabled());
556e58fe
RT		 957 BUG_ON(hwif == NULL);
958
ef29888e 959 mutex_lock(&ide_cfg_mtx);
1da177e4
LT		 960 hwif->hwgroup = NULL;
961#if MAX_HWIFS > 1
962 /*
963 * Group up with any other hwifs that share our irq(s).
964 */
965 for (index = 0; index < MAX_HWIFS; index++) {
966 ide_hwif_t *h = &ide_hwifs[index];
967 if (h->hwgroup) { /* scan only initialized hwif's */
968 if (hwif->irq == h->irq) {
969 hwif->sharing_irq = h->sharing_irq = 1;
970 if (hwif->chipset != ide_pci ||
971 h->chipset != ide_pci) {
972 save_match(hwif, h, &match);
973 }
974 }
975 if (hwif->serialized) {
976 if (hwif->mate && hwif->mate->irq == h->irq)
977 save_match(hwif, h, &match);
978 }
979 if (h->serialized) {
980 if (h->mate && hwif->irq == h->mate->irq)
981 save_match(hwif, h, &match);
982 }
983 }
984 }
985#endif /* MAX_HWIFS > 1 */
986 /*
987 * If we are still without a hwgroup, then form a new one
988 */
989 if (match) {
990 hwgroup = match->hwgroup;
991 hwif->hwgroup = hwgroup;
992 /*
993 * Link us into the hwgroup.
994 * This must be done early, do ensure that unexpected_intr
995 * can find the hwif and prevent irq storms.
996 * No drives are attached to the new hwif, choose_drive
997 * can't do anything stupid (yet).
998 * Add ourself as the 2nd entry to the hwgroup->hwif
999 * linked list, the first entry is the hwif that owns
1000 * hwgroup->handler - do not change that.
1001 */
1002 spin_lock_irq(&ide_lock);
1003 hwif->next = hwgroup->hwif->next;
1004 hwgroup->hwif->next = hwif;
1005 spin_unlock_irq(&ide_lock);
1006 } else {
94f6030c
CL		 1007 hwgroup = kmalloc_node(sizeof(ide_hwgroup_t),
1008 GFP_KERNEL | __GFP_ZERO,
556e58fe 1009 hwif_to_node(hwif->drives[0].hwif));
1da177e4
LT		 1010 if (!hwgroup)
1011 goto out_up;
1012
1013 hwif->hwgroup = hwgroup;
1014
1da177e4
LT		 1015 hwgroup->hwif = hwif->next = hwif;
1016 hwgroup->rq = NULL;
1017 hwgroup->handler = NULL;
1018 hwgroup->drive = NULL;
1019 hwgroup->busy = 0;
1020 init_timer(&hwgroup->timer);
1021 hwgroup->timer.function = &ide_timer_expiry;
1022 hwgroup->timer.data = (unsigned long) hwgroup;
1023 }
1024
1025 /*
1026 * Allocate the irq, if not already obtained for another hwif
1027 */
1028 if (!match || match->irq != hwif->irq) {
7b5da4be 1029 int sa = 0;
1da177e4 1030#if defined(__mc68000__) || defined(CONFIG_APUS)
362537b9 1031 sa = IRQF_SHARED;
1da177e4
LT		 1032#endif /* __mc68000__ || CONFIG_APUS */
1033
7b5da4be 1034 if (IDE_CHIPSET_IS_PCI(hwif->chipset))
362537b9 1035 sa = IRQF_SHARED;
1da177e4
LT		 1036
1037 if (hwif->io_ports[IDE_CONTROL_OFFSET])
1038 /* clear nIEN */
1039 hwif->OUTB(0x08, hwif->io_ports[IDE_CONTROL_OFFSET]);
1040
1041 if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup))
1042 goto out_unlink;
1043 }
1044
1045 /*
1046 * For any present drive:
1047 * - allocate the block device queue
1048 * - link drive into the hwgroup
1049 */
1050 for (index = 0; index < MAX_DRIVES; ++index) {
1051 ide_drive_t *drive = &hwif->drives[index];
1052 if (!drive->present)
1053 continue;
1054 if (ide_init_queue(drive)) {
1055 printk(KERN_ERR "ide: failed to init %s\n",drive->name);
1056 continue;
1057 }
1058 spin_lock_irq(&ide_lock);
1059 if (!hwgroup->drive) {
1060 /* first drive for hwgroup. */
1061 drive->next = drive;
1062 hwgroup->drive = drive;
1063 hwgroup->hwif = HWIF(hwgroup->drive);
1064 } else {
1065 drive->next = hwgroup->drive->next;
1066 hwgroup->drive->next = drive;
1067 }
1068 spin_unlock_irq(&ide_lock);
1069 }
1070
c6387a48 1071#if !defined(__mc68000__) && !defined(CONFIG_APUS)
1da177e4
LT		 1072 printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name,
1073 hwif->io_ports[IDE_DATA_OFFSET],
1074 hwif->io_ports[IDE_DATA_OFFSET]+7,
1075 hwif->io_ports[IDE_CONTROL_OFFSET], hwif->irq);
1da177e4
LT		 1076#else
1077 printk("%s at 0x%08lx on irq %d", hwif->name,
1078 hwif->io_ports[IDE_DATA_OFFSET], hwif->irq);
1079#endif /* __mc68000__ && CONFIG_APUS */
1080 if (match)
1081 printk(" (%sed with %s)",
1082 hwif->sharing_irq ? "shar" : "serializ", match->name);
1083 printk("\n");
ef29888e 1084 mutex_unlock(&ide_cfg_mtx);
1da177e4
LT		 1085 return 0;
1086out_unlink:
1087 spin_lock_irq(&ide_lock);
1088 if (hwif->next == hwif) {
1089 BUG_ON(match);
1090 BUG_ON(hwgroup->hwif != hwif);
1091 kfree(hwgroup);
1092 } else {
1093 ide_hwif_t *g;
1094 g = hwgroup->hwif;
1095 while (g->next != hwif)
1096 g = g->next;
1097 g->next = hwif->next;
1098 if (hwgroup->hwif == hwif) {
1099 /* Impossible. */
1100 printk(KERN_ERR "Duh. Uninitialized hwif listed as active hwif.\n");
1101 hwgroup->hwif = g;
1102 }
1103 BUG_ON(hwgroup->hwif == hwif);
1104 }
1105 spin_unlock_irq(&ide_lock);
1106out_up:
ef29888e 1107 mutex_unlock(&ide_cfg_mtx);
1da177e4
LT		 1108 return 1;
1109}
1110
1111static int ata_lock(dev_t dev, void *data)
1112{
1113 /* FIXME: we want to pin hwif down */
1114 return 0;
1115}
1116
1117static struct kobject *ata_probe(dev_t dev, int *part, void *data)
1118{
1119 ide_hwif_t *hwif = data;
1120 int unit = *part >> PARTN_BITS;
1121 ide_drive_t *drive = &hwif->drives[unit];
1122 if (!drive->present)
1123 return NULL;
1124
1125 if (drive->media == ide_disk)
1126 request_module("ide-disk");
1127 if (drive->scsi)
1128 request_module("ide-scsi");
1129 if (drive->media == ide_cdrom || drive->media == ide_optical)
1130 request_module("ide-cd");
1131 if (drive->media == ide_tape)
1132 request_module("ide-tape");
1133 if (drive->media == ide_floppy)
1134 request_module("ide-floppy");
1135
1136 return NULL;
1137}
1138
1139static struct kobject *exact_match(dev_t dev, int *part, void *data)
1140{
1141 struct gendisk *p = data;
1142 *part &= (1 << PARTN_BITS) - 1;
edfaa7c3 1143 return &p->dev.kobj;
1da177e4
LT		 1144}
1145
1146static int exact_lock(dev_t dev, void *data)
1147{
1148 struct gendisk *p = data;
1149
1150 if (!get_disk(p))
1151 return -1;
1152 return 0;
1153}
1154
1155void ide_register_region(struct gendisk *disk)
1156{
1157 blk_register_region(MKDEV(disk->major, disk->first_minor),
1158 disk->minors, NULL, exact_match, exact_lock, disk);
1159}
1160
1161EXPORT_SYMBOL_GPL(ide_register_region);
1162
1163void ide_unregister_region(struct gendisk *disk)
1164{
1165 blk_unregister_region(MKDEV(disk->major, disk->first_minor),
1166 disk->minors);
1167}
1168
1169EXPORT_SYMBOL_GPL(ide_unregister_region);
1170
1171void ide_init_disk(struct gendisk *disk, ide_drive_t *drive)
1172{
1173 ide_hwif_t *hwif = drive->hwif;
1174 unsigned int unit = (drive->select.all >> 4) & 1;
1175
1176 disk->major = hwif->major;
1177 disk->first_minor = unit << PARTN_BITS;
1178 sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit);
1179 disk->queue = drive->queue;
1180}
1181
1182EXPORT_SYMBOL_GPL(ide_init_disk);
1183
8604affd
BZ		 1184static void ide_remove_drive_from_hwgroup(ide_drive_t *drive)
1185{
1186 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup;
1187
1188 if (drive == drive->next) {
1189 /* special case: last drive from hwgroup. */
1190 BUG_ON(hwgroup->drive != drive);
1191 hwgroup->drive = NULL;
1192 } else {
1193 ide_drive_t *walk;
1194
1195 walk = hwgroup->drive;
1196 while (walk->next != drive)
1197 walk = walk->next;
1198 walk->next = drive->next;
1199 if (hwgroup->drive == drive) {
1200 hwgroup->drive = drive->next;
1201 hwgroup->hwif = hwgroup->drive->hwif;
1202 }
1203 }
1204 BUG_ON(hwgroup->drive == drive);
1205}
1206
1da177e4
LT		 1207static void drive_release_dev (struct device *dev)
1208{
1209 ide_drive_t *drive = container_of(dev, ide_drive_t, gendev);
1210
8604affd 1211 spin_lock_irq(&ide_lock);
8604affd 1212 ide_remove_drive_from_hwgroup(drive);
6044ec88
JJ		 1213 kfree(drive->id);
1214 drive->id = NULL;
8604affd
BZ		 1215 drive->present = 0;
1216 /* Messed up locking ... */
1217 spin_unlock_irq(&ide_lock);
1218 blk_cleanup_queue(drive->queue);
1219 spin_lock_irq(&ide_lock);
1220 drive->queue = NULL;
1221 spin_unlock_irq(&ide_lock);
1222
f36d4024 1223 complete(&drive->gendev_rel_comp);
1da177e4
LT		 1224}
1225
1226/*
1227 * init_gendisk() (as opposed to ide_geninit) is called for each major device,
1228 * after probing for drives, to allocate partition tables and other data
1229 * structures needed for the routines in genhd.c. ide_geninit() gets called
1230 * somewhat later, during the partition check.
1231 */
1232static void init_gendisk (ide_hwif_t *hwif)
1233{
1234 unsigned int unit;
1235
1236 for (unit = 0; unit < MAX_DRIVES; ++unit) {
1237 ide_drive_t * drive = &hwif->drives[unit];
1238 ide_add_generic_settings(drive);
1239 snprintf(drive->gendev.bus_id,BUS_ID_SIZE,"%u.%u",
1240 hwif->index,unit);
1241 drive->gendev.parent = &hwif->gendev;
1242 drive->gendev.bus = &ide_bus_type;
1243 drive->gendev.driver_data = drive;
1244 drive->gendev.release = drive_release_dev;
1da177e4
LT		 1245 }
1246 blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS,
1247 THIS_MODULE, ata_probe, ata_lock, hwif);
1248}
1249
1250static int hwif_init(ide_hwif_t *hwif)
1251{
1252 int old_irq;
1253
1254 /* Return success if no device is connected */
1255 if (!hwif->present)
1256 return 1;
1257
1258 if (!hwif->irq) {
1259 if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET])))
1260 {
1261 printk("%s: DISABLED, NO IRQ\n", hwif->name);
1262 return (hwif->present = 0);
1263 }
1264 }
1265#ifdef CONFIG_BLK_DEV_HD
1266 if (hwif->irq == HD_IRQ && hwif->io_ports[IDE_DATA_OFFSET] != HD_DATA) {
1267 printk("%s: CANNOT SHARE IRQ WITH OLD "
1268 "HARDDISK DRIVER (hd.c)\n", hwif->name);
1269 return (hwif->present = 0);
1270 }
1271#endif /* CONFIG_BLK_DEV_HD */
1272
1273 /* we set it back to 1 if all is ok below */
1274 hwif->present = 0;
1275
1276 if (register_blkdev(hwif->major, hwif->name))
1277 return 0;
1278
1279 if (!hwif->sg_max_nents)
1280 hwif->sg_max_nents = PRD_ENTRIES;
1281
45711f1a 1282 hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents,
1da177e4
LT		 1283 GFP_KERNEL);
1284 if (!hwif->sg_table) {
1285 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name);
1286 goto out;
1287 }
45711f1a
JA		 1288
1289 sg_init_table(hwif->sg_table, hwif->sg_max_nents);
1da177e4
LT		 1290
1291 if (init_irq(hwif) == 0)
1292 goto done;
1293
1294 old_irq = hwif->irq;
1295 /*
1296 * It failed to initialise. Find the default IRQ for
1297 * this port and try that.
1298 */
1299 if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]))) {
1300 printk("%s: Disabled unable to get IRQ %d.\n",
1301 hwif->name, old_irq);
1302 goto out;
1303 }
1304 if (init_irq(hwif)) {
1305 printk("%s: probed IRQ %d and default IRQ %d failed.\n",
1306 hwif->name, old_irq, hwif->irq);
1307 goto out;
1308 }
1309 printk("%s: probed IRQ %d failed, using default.\n",
1310 hwif->name, hwif->irq);
1311
1312done:
1313 init_gendisk(hwif);
e3a59b4d
HR		 1314
1315 ide_acpi_init(hwif);
1316
1da177e4
LT		 1317 hwif->present = 1; /* success */
1318 return 1;
1319
1320out:
1321 unregister_blkdev(hwif->major, hwif->name);
1322 return 0;
1323}
1324
9601a607
BZ		 1325static void hwif_register_devices(ide_hwif_t *hwif)
1326{
1327 unsigned int i;
1328
1329 for (i = 0; i < MAX_DRIVES; i++) {
1330 ide_drive_t *drive = &hwif->drives[i];
1331
1332 if (drive->present) {
1333 int ret = device_register(&drive->gendev);
1334
1335 if (ret < 0)
1336 printk(KERN_WARNING "IDE: %s: "
1337 "device_register error: %d\n",
1338 __FUNCTION__, ret);
1339 }
1340 }
1341}
1342
1da177e4
LT		 1343int ideprobe_init (void)
1344{
1345 unsigned int index;
1346 int probe[MAX_HWIFS];
1347
1348 memset(probe, 0, MAX_HWIFS * sizeof(int));
1349 for (index = 0; index < MAX_HWIFS; ++index)
1350 probe[index] = !ide_hwifs[index].present;
1351
1352 for (index = 0; index < MAX_HWIFS; ++index)
1353 if (probe[index])
fd9bb539 1354 probe_hwif(&ide_hwifs[index]);
1da177e4
LT		 1355 for (index = 0; index < MAX_HWIFS; ++index)
1356 if (probe[index])
1357 hwif_init(&ide_hwifs[index]);
1358 for (index = 0; index < MAX_HWIFS; ++index) {
1359 if (probe[index]) {
1360 ide_hwif_t *hwif = &ide_hwifs[index];
1da177e4
LT		 1361 if (!hwif->present)
1362 continue;
1363 if (hwif->chipset == ide_unknown || hwif->chipset == ide_forced)
1364 hwif->chipset = ide_generic;
9601a607 1365 hwif_register_devices(hwif);
1da177e4
LT		 1366 }
1367 }
5cbf79cd
BZ		 1368 for (index = 0; index < MAX_HWIFS; ++index)
1369 if (probe[index])
1370 ide_proc_register_port(&ide_hwifs[index]);
1da177e4
LT		 1371 return 0;
1372}
1373
1374EXPORT_SYMBOL_GPL(ideprobe_init);
8447d9d5
BZ		 1375
1376int ide_device_add(u8 idx[4])
1377{
ba6560aa 1378 ide_hwif_t *hwif;
8447d9d5
BZ		 1379 int i, rc = 0;
1380
1381 for (i = 0; i < 4; i++) {
ba6560aa
BZ		 1382 if (idx[i] == 0xff)
1383 continue;
1384
2e13093a
BZ		 1385 probe_hwif(&ide_hwifs[idx[i]]);
1386 }
ba6560aa 1387
2e13093a
BZ		 1388 for (i = 0; i < 4; i++) {
1389 if (idx[i] == 0xff)
1390 continue;
1391
1392 hwif = &ide_hwifs[idx[i]];
ba6560aa
BZ		 1393
1394 if (hwif_init(hwif) == 0) {
1395 printk(KERN_INFO "%s: failed to initialize IDE "
1396 "interface\n", hwif->name);
1397 rc = -1;
1398 continue;
1399 }
2e13093a
BZ		 1400 }
1401
1402 for (i = 0; i < 4; i++) {
1403 if (idx[i] == 0xff)
1404 continue;
1405
1406 hwif = &ide_hwifs[idx[i]];
ba6560aa 1407
71518342
BZ		 1408 if (hwif->present) {
1409 if (hwif->chipset == ide_unknown ||
1410 hwif->chipset == ide_forced)
1411 hwif->chipset = ide_generic;
ba6560aa 1412 hwif_register_devices(hwif);
71518342 1413 }
8447d9d5
BZ		 1414 }
1415
1416 for (i = 0; i < 4; i++) {
1417 if (idx[i] != 0xff)
1418 ide_proc_register_port(&ide_hwifs[idx[i]]);
1419 }
1420
1421 return rc;
1422}
1423
1424EXPORT_SYMBOL_GPL(ide_device_add);
kernel source for telekom puls (alcatel/mediatek)